Tire construction



Jan. 30, 1945. H, M, RENNER 2,368,325

TIRE CONSTRUCTION Filed May 27, 1943 I N VEN TOR.

Hen ry Miien A ENE).

Patented Jan. 30, 1945 v UNITED STATES PATENT OFFICE TIRE CONSTRUCTION Henry M. Renner, Fort Benning, Ga. Application May 27, 1943, Serial No. 488,761

3 Claims.

This invention relates to pneumatic tires for motor vehicles and the like and it consists in the constructions, arrangements and combinations herein described and claimed.

It is the cardinal object of the invention to provide a pneumatic tire of a structure which will withstand unusual load weights and stresses,

The carcass ll may be built up a usual of.

' fabric or cords, or both, as desired, the steel increase the life of the tire, yet retain as much,'

if not greater resiliences than the ordinary vehicle tire.

More specifically, it is an object of the invention to provide a pneumatic tire casing in which an annular steel tread or treads are embedded integrally within the rubber tread of a tire, and having a portion exposed for traction purposes, the tread or treads occupying a position medially of the tire.

It is also an important object of the invention to provide a novel construction of tread enabling its ready and permanent securement within the tread of a tire after once being molded therein.

Additional objects, advantages and features of invention will be apparent from the following description, considered in conjunction with the accompanying drawing, wherein,

Figure 1 is a cross section of a tire constructed in accordance with my invention,

Figure 2 is a reduced fragmentary elevation of the tire.

Figure 3 is a plan view of a traction band employed in the construction of the tir Figure 4 is a fragmentary cross section, in perspective, of the traction band. r

Figure 5 is a cross section of a modified form of the tire. Reference is first made to Figures 1 and 2 of the drawing, wherein there is shown a pneumatic tire l0 consisting of a fabric or cord carcass H as customarily constructed for use in tires of conventional form.

The present construction of tire is for heavy duty use, particularly trucks, tractors and the like, and therefore a pair of annular steel traction treads H! are employed, embedded within the rubber tread body I 3.

The treads P2 are substantially I-shaped as seen in cross section, having a broad base l4 and a narrower tread face IS, the base and face being integrally connected by a flange l6, medially of their widths. As clearly shown in Figures 3 and 4, the flange I6 is formed with a multiplicity of apertures I1 spaced circumferentially thereof, and these together with the base It afford a secure incorporation within the tire tread I 3. It will be noted that the base I4 of the tread is treads l2 and the carcass I l are now placed in a suitable mold, the arcuate bases l4 contacting the outer layer of fabric or cord. The treads I2 are suitably spaced apart and retained, and when the rubber compound is placed in the tire mold, the

compound will flow in and around the treads l2 and through the apertures l'l thereof. The tread design of the mold will include a circumferential medially positioned bead for the formation of a central flexing groove ll of the tire tread, which it will be noted is positioned between the treads l2.

The overall height of the traction treads will vary according to the size of the tire to be constructed, but in all cases, the tread face l5 will stop flush with the outermost surface of the tread body [3.

In Figure 5, a modification of the tire is shown, a construction which is suitable for light cars and trucks. The construction is identical with that just described, except that a single traction tread I2 is employed, which in positioned centrally of the treadlbody 13.

A tire constructed in accordance with the present invention will provide a tire of long use, since the metallic treads l2 and I2" will absorb much of the wear which the tread [body l3 or 13' would ordinarily receive and in addition, the treads lend stability to the tire as a whole, and will lessen side wall breakage in the case of excessive loads or under inflation of the tire.

While I have shown and described certain preferred forms of the tire, this is by way of illustration only, and I consider as my own all such modifications in construction as fairly fall within the scope of the appended claims.

1. In a pneumatic tire, a carcass and tread bonded together, spaced apart annular metallic tread members embedded within the tread and lying flush with the outer surface of the tread,

bonded together, an annular auxiliary metallic tread member embedded within the tread and this instance, is

2. In a pneumatic tire, a carcass and tread terminating flush with the outer surface of said tread, said metallic tread consisting of a broad arcuate-shaped base and a narrower traction face, said base and traction face being integrally connected by a medial continuous flange and said flange having a multiplicity of apertures therethrough to effect anchorage with the material of said tread. r i

3. In a pneumatic tire, a carcass and tread.

' bonded together and spaced apart annular metal- 

